Balance board



FIG. 1 is a front perspective view of a balance board, showing our design.

FIG. 2 is a rear perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken line showing of portions of the balance board depicts environment and forms no part of the claim. 

CLAIM The ornamental design for a balance board, as shown and described. 